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web/wsgi.py

@@ -0,0 +1,87 @@
+"""
+WSGI Utilities
+(from web.py)
+"""
+
+import os
+import sys
+
+from . import httpserver
+from . import webapi as web
+from .net import validaddr
+from .utils import intget, listget
+
+
+def runfcgi(func, addr=("localhost", 8000)):
+    """Runs a WSGI function as a FastCGI server."""
+    import flup.server.fcgi as flups
+
+    return flups.WSGIServer(func, multiplexed=True, bindAddress=addr, debug=False).run()
+
+
+def runscgi(func, addr=("localhost", 4000)):
+    """Runs a WSGI function as an SCGI server."""
+    import flup.server.scgi as flups
+
+    return flups.WSGIServer(func, bindAddress=addr, debug=False).run()
+
+
+def runwsgi(func):
+    """
+    Runs a WSGI-compatible `func` using FCGI, SCGI, or a simple web server,
+    as appropriate based on context and `sys.argv`.
+    """
+
+    if "SERVER_SOFTWARE" in os.environ:  # cgi
+        os.environ["FCGI_FORCE_CGI"] = "Y"
+
+    # PHP_FCGI_CHILDREN is used by lighttpd fastcgi
+    if "PHP_FCGI_CHILDREN" in os.environ or "SERVER_SOFTWARE" in os.environ:
+        return runfcgi(func, None)
+
+    if "fcgi" in sys.argv or "fastcgi" in sys.argv:
+        args = sys.argv[1:]
+        if "fastcgi" in args:
+            args.remove("fastcgi")
+        elif "fcgi" in args:
+            args.remove("fcgi")
+
+        if args:
+            return runfcgi(func, validaddr(args[0]))
+        else:
+            return runfcgi(func, None)
+
+    if "scgi" in sys.argv:
+        args = sys.argv[1:]
+        args.remove("scgi")
+        if args:
+            return runscgi(func, validaddr(args[0]))
+        else:
+            return runscgi(func)
+
+    server_addr = validaddr(listget(sys.argv, 1, ""))
+    if "PORT" in os.environ:  # e.g. Heroku
+        server_addr = ("0.0.0.0", intget(os.environ["PORT"]))
+
+    return httpserver.runsimple(func, server_addr)
+
+
+def _is_dev_mode():
+    # Some embedded python interpreters won't have sys.arv
+    # For details, see https://github.com/webpy/webpy/issues/87
+    argv = getattr(sys, "argv", [])
+
+    # quick hack to check if the program is running in dev mode.
+    if (
+        "SERVER_SOFTWARE" in os.environ
+        or "PHP_FCGI_CHILDREN" in os.environ
+        or "fcgi" in argv
+        or "fastcgi" in argv
+        or "mod_wsgi" in argv
+    ):
+        return False
+    return True
+
+
+# When running the builtin-server, enable debug mode if not already set.
+web.config.setdefault("debug", _is_dev_mode())